Never used, in box w/ instructions. Retails for $55, asking 25,
Specs:
WiFi up to 300Mbps
External antennas for better performance
Convenient wall-plug design
Works with any WiFi router
Boost N300 WiFi
Improve the range of your existing N300 WiFi network.
External Antennas- For better WiFi coverage.
Fast Ethernet Port- Connect a wired device like a Blu-ray® player, game console, TV or streaming player to your WiFi network.
WiFi Performance - N300 (300 Mbps)†
WiFi Band- 2.4GHz
Number of Ethernet Ports - One (1) fast Ethernet port

-Key Features-
Extend Internet access for wireless devices throughout your home
Fast Ethernet port to connect home A/V devices to the network
Ease of Use
CD-less setup—great for mobile devices
Push ‘N’ Connect using Wi-Fi Protected Setup® (WPS)1
Security - WiFi Protected Access® (WPA/WPA2-PSK) and WEP